import cv2
import numpy as np
img=cv2.imread('CV-Pictures/015.jpg',0)
cv2.imshow('img',img)
dst1=cv2.Canny(img,100,200)
dst2=cv2.Canny(img,64,128)
cv2.imshow('dst1',dst1)
cv2.imshow('dst2',dst2)
cv2.waitKey()
cv2.destroyAllWindows()